City of Houston Health Department, Bureau of Laboratory Services
Water testing lab in Houston, Harris County, Texas.
Independent directory. Listings come from the TCEQ Public Water System Lab Map Table (updated 03/26/2026). These labs are accredited for public drinking-water samples; call first to confirm they accept private-well samples, which tests they run, sample bottles, drop-off hours and price.
City of Houston Health Department, Bureau of Laboratory Services
2250 Holcomb Boulevard, Houston, TX 77030 · map (OpenStreetMap)
Phone: (832) 393-3939
Bacteria (total coliform / E. coli)